近50年川中丘陵区气候变化及与ENSO关系研究

The Relationship between Climate Changes in the Hill Region of Middle Sichuan during Last 50 Years and ENSO

主要根据南充气温和降水资料,利用相关分析、差积曲线法和交叉列联表χ2分析,研究了川中丘陵区近50年气候变化及与ENSO的关系。结果表明,川中丘陵区的气温和降水与ENSO有关,La Ni a年份年降水增加,非ENSO状态的夏季气温偏高;年降水和夏季降水极不稳定,夏季和秋季降水变化有一定的反相关系,从80年代初到90年代中期经历了较强的偏冷阶段。

The relationships between ENSO and the climate changes in the hill region of middle Sichuan during last 50 years are investigated by using correlation analysis,residual mass curve and crosstabs chi -square test. The results show that the relationships are noticeable. In La Nina year,the annual precipitation in the hill region of middle Sichuan will be increased. In non - ENSO year,the summerly temperature will be warm. Annual and summerly precipitation in the hill region of middle Siehuan is very instable,and the area go through stronger cold period from 1980 - 1997.